The increase in advertising by campaigns during the final weeks or days before an election is related to which of the following?

A. The need to sway voters that have committed to the opposing candidate
B. The requirement by the Federal Elections Commission that all campaign funds be expended before election day
C. A reduction in advertising costs on television networks and radio stations
D. A desire to gain the support of an undecided voter
E. The need to counteract any decline in party support related to debates

Answer: D